SYNTHESIS OF BI-2222 COMPOUNDS NOT CONTAINING TETRAVALENT IONS - BI2SR2-XLA2-YLNX+YCU2OZ (LN = SM, EU, GD AND DY)

Authors
SASAKURA H TSUJI K YOSHIARA K
Citation
H. Sasakura et al., SYNTHESIS OF BI-2222 COMPOUNDS NOT CONTAINING TETRAVALENT IONS - BI2SR2-XLA2-YLNX+YCU2OZ (LN = SM, EU, GD AND DY), Physica. C, Superconductivity, 218(3-4), 1993, pp. 495-500
Citations number
14
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
218
Issue
3-4
Year of publication
1993
Pages
495 - 500
Database
ISI
SICI code
0921-4534(1993)218:3-4<495:SOBCNC>2.0.ZU;2-C
Abstract
Bi-based cuprate systems with the 2222 structure have been synthesized without doping of tetravalent ions such as Ce4+ or Pr4+ in the Bi2Sr2 -xLa2-yLnx+yCu2Oz (Ln=Sm, Eu, Gd and Dy) systems. The almost-single ph ase sample for each system was attained at a limited composition. All of the sample for each system was semiconducting, and the conduction p rocess at low temperatures was assumed to be followed by a two-dimensi onal variable-range hopping. The results after partial substitution of Pb for Bi and annealing under high-pressure O2 atmosphere are also re ported.